Knotter.



H. D. C-OLMAN.

KNOTTER.

APPLICATION FILED JUNE 24, 1907.

Patented Apr.l19, 1910.

2 SHEETS-SHEET 2.

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OWARD D. COLMAN, 0F ROCKFO-RD, LLLINOIS, ASSIGNGR TO BARBER-COLMAN COMPANY, 0F ROCKEORD, ILLINOIS, A CORPORATION 0F ILLINOIS.

KNOTTER.

Toad whom it ,my concern:

Be it known that'lf, HOWARD D. CoLMAN, a citizen ofthe United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful `Improvements in Knotters, of.

which lthe following is a specification.

This invention relates to mechanisms for tying knots, .and refers vparticularly to an improved means for tightening the loops of the knot and stripping the knotoif the loopforming device.

I have herein shown ,my .invention as forming part of a warp-tying machine such as is shown in my copendingapplication Serial No. 208,779, filed May 19,1904, but

it will be understood that the invention is adapted for use in various other connections.

In the accompanying drawings, which illustrate an embodiment. of my invention, Figure 1 is a top plan view of a knotter and certain of those parts`of the warp-tying machine which cooperate directly with the knotter. Fig. 2 is a vertical sectional view taken substantially on the plane of dotted line 2 of Fig. 1. Fig. 3 is a perspective view illustrating the stripper device.

In the warp-tying machine to which reference has been made, the two -warps a and b to be tied together are arranged in parallel horizontal. planes, .as .indicated in Fig.

1 are the selectors by means vof which pairs of warp threads -are selected, one thread from each of the'warps, Aand moved inwardly a sufficient distance for the wings 2 of the reciprocatory separator' device 3 to enter between the selected threads and the warps for separating said threads frointheir warps. The separator device 3 carries a fork l by means of which the two selected threads are brought closer together and iny serted into a key-holeslot 5 .formed -in a stationary guide 6. Said separator `device also Acarries 'means (not shown) Vfor inserting 'the selected xthreads finto .the forward end lof an eXhanstia-ir tube 7 fin which they are 4held duri-ngen. portion of-the knot-forming operation, land by ,imeans olf which lthe waste ends clipped from the knot arecarried off. lPrevious:toJoeing inserted .in ysaid tube,

K Specification of Iietters Patent. Pgmgjlfd Apr, 19, 1910,A Application filed June 24, 1907. "Serial No. 380,405. i

the warp threads are severed, to form loose ends, by a shearcomprismg a blade 8 fixed to the reciprocatory separator device 3 andv a relatively stationary shear blade 9. lifhen the threads are thus' placed in thegnide 6 and the suction'tube 7 said' threads lie beneath the tying` 'bill to be hereinafter 'de- Y scribed and extend over a bearing edge 10' and across two guides 11. Said guides have hooked forward ends 12 adapted to prevent displacementof the threads in one direction, and shoulders 13 to prevent displacementof said threads in the opposite direction.l The guides ,1l are slightly spaced apart and -be-A tween :them moves a stripper Vdevice to be 1hereinafter described.

The knotter comprises a\ rota-tory Atying bil-l lllhaving shearing and clamping jaws,

said bill being rotated by means of a spiraL l f by theft-ying bill 14 in its-rotations and for stripjp g thefknot from-said bill comprises a 4rock shaft 22 having'an arm 23 xed thereto. The arm 23 carries a pivot pin 24 upon which is mounted a hook 25, saidihook being arranged to move between the guides 11. Upon-the hub of .saidhook is a lug 26 -to which is attached one end of a coiled spring 27, vthe other end of said spring beingtlxed to a stationary part of the machine. vA lu 28 on the hook 25 is adapted to be engage l by a -Xed pin 29 when the hook is near the 'forward end of its movement, Ifor ltilting said hook to permit the 'threads to be fork 4.

The means herein shownvfor yrocking the `laced Vrearwardly of its forward hooked end.- y the and engaging -an armzl Vrigidly attached to the shaft 22. ,The cam 30 com rises the concentric .;portion.or.ydw ell 32am the cam surface.53.3. s The armfl fis held V.against the;

cam 30 by the spring 27, said spring also tending to move the stripper hook into the operative or thread-engaging position, as shown in Figs. 1 and Q. During the tighteningl and stripping movement of the hook its forward end slides upon the ledge 34.

35 is'a fork traveling with the separator device 3 and serving to draw the completed knot away from the guides G and 11.

i\ssuni`ing the parts to be in the position shown in Fig. 3, the operation is as follows: 'The tying bill 14 is rotated, forming lo'ops in the two threads, the arin31 meanwhile being held against the concentric portion or dwell 3Q of the cam 30 by the spring-27 and the stripper hook 25 standing in the tilted l Vvvhenthe position shown in said figure. tying bill has completed the formation of the knot, and has clipped and clamped the ends of the knot, the cam 30 has been rotated into position to permit the spring 27 to draw the hook 25 rearwardly, said hook swinging downwardly and 'catching the threads as The rearward movement of the hook 25 draws the t threads between the guides 11 as shown in Fig. l, tightening the knot and strippingit from the tying bill 14. The fork 35 moving forward c. to the left, Fig. l) with the separator device at this time draws the knotited ends out ot the throatway 5. Meanwhile the cam 30 returns the hook 25 to its forward position, said hook being tilted upwardly by the engagement of the lug 28 with t-he pin 29 as another pair of threads are brought up to the knotter by the separator device. i

It will be apparent to those skilled in the art that various mechanical embodiments of the invention are possible, and I therefore do not wish to be limited to the arrangement and construction shown.

I claim as my invention:

1. Ina knot-tyiiig mechanism, in combination, 'means for forming a knot; two members across which the knotted threads extend and a hook adaptedto draw the knotted threads into the space between said members to strip said knotted threads from the knot-forming means.

2Q In a knot-tying mechanism, in combination, means for forming a knot; two members across which the knotted threads extend; and a reciprocatory hook adapted to draw the knotted threads into the space between said members. y

3. In a knot-tying mechanism, in combination, means for forming a knot; a pivoted arm; a hook pivotally mounted on said arm and adapted *to engage the knotted threads; a iXed pin; a. lug on said hook adapted to engage said pin for tilting said honk: a spring tending to pivotally move able toward and away from the knot-forniing means, said hook being pivoted on its actuating means.

6. In a knot-tying mechanism, the combination with a. knot-forming means, of a reciprocatory and swinging hook for moving the threads from the knot-forming means, and means for imparting a swinging movement to the hook at about one limit of its reciprocatory movement.

7. In a knot-tying mechanism, the combination with a knot-forming means, of a reciprocatory thread-engaging means having a swinging movement at approximately the limit of its reciprocatory movement in one direction, so as to engage the thread and remove it trom the knot-forming means.

8. A tightening and stripping mechanism for knotters comprising a member across which the threads extend, said member having a shoulder thereon to limit the movement of the threads in one direction, and a reciprocatory hook adapted to engage and pull the threads over said shoulder.

9. A tightening and stripping mechanism for knotters comprisin a. .member across which the threads exten said member having a shoulder thereon to limit the movements of the threads in. one direction, and a reciprocatory hook adapted to swing upward'to pass over the threads, said hook being arranged to 1 engage and pull the threads over said shoulder.

10. A tightening and stripping mechanism for knotters comprising two shouldered members'across which the threads extend, and a reciprocatory hook arranged to draw the threads into the space be Ween .said members.

11. A tightening and stripping mechanism for knotters comprising a reeiprocatory hook, means for reciprocating said hook and means for raising said hook to pass over the threads.

1:2. A tightening and stripping mechanism for knotterscomprising a reciprocatory hook, means for reciprocating said' hook,

ism for knotters Comprising a shouldered.V is arranged to slide, a stationary lug, and member across which the threads extend, a a lug on said hook adapted to engage said 10 movable member, a hook mounted on said stationary lug for rocking said hook in one movable member, a spring tending to move direction.

said movable memberin one'drection and HOWARD D. COLMAN. rocksaid hook in one direction, means for Witnesses:

moving said movable member in the oppo- ALBERT E. MEGGISON, site direction, a part along which said hook ROY HANSTROM. 

